1. JW Youdas, PT, MS, is Physical Therapist, Physical Therapy Program, Mayo School of Health-Related Sciences, and Assistant Professor of Physical Therapy, Mayo Medical School, Rochester, Minn.
2. TR Garrett, PT, BA, is Physical Therapist, Physical Therapy Program, Mayo School of Health-Related Sciences, and Assistant Professor of Physical Therapy, Mayo Medical School
3. KS Egan, MPhil, is Statistician, Department of Health Sciences Research, Mayo Clinic and Mayo Foundation
4. TM Therneau, PhD, is Consultant, Department of Health Sciences Research, Mayo Clinic and Mayo Foundation, and Associate Professor of Biostatistics, Mayo Medical School